无法通过Java连接到SQL Server 2014

Question

Question has been updated (The DriverManager is no longer loaded manually and instead the getConnection() method is used):

package guii;

import java.sql.Connection;
import java.sql.DatabaseMetaData;
import java.sql.DriverManager;
import java.sql.SQLException;

/**
 * This program demonstrates how to establish database connection to Microsoft
 * SQL Server.
 * @author www.codejava.net
 *
 */
public class JdbcSQLServerConnection {

public static void main(String[] args) {

    Connection conn = null;

    try {

        String dbURL = "jdbc:sqlserver://ASUS\\YES:1433";
        String user = "TestingUser";
        String pass = "12345";
        conn = DriverManager.getConnection(dbURL, user, pass);
        if (conn != null) {
            DatabaseMetaData dm = (DatabaseMetaData) conn.getMetaData();
            System.out.println("Driver name: " + dm.getDriverName());
            System.out.println("Driver version: " + dm.getDriverVersion());
            System.out.println("Product name: " + dm.getDatabaseProductName());
            System.out.println("Product version: " + dm.getDatabaseProductVersion());
        }

    } catch (SQLException ex) {
        ex.printStackTrace();
    } finally {
        try {
            if (conn != null && !conn.isClosed()) {
                conn.close();
            }
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
    }
}
}

The problem is the resulting Exception of this code. I can't find out know the reason why that particular exception is thrown.

The username, password and servername were double checked and they are definitively correct.

Currently this exception is thrown:

com.microsoft.sqlserver.jdbc.SQLServerException: Login failed for user 'TestingUser'.
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:196)
at com.microsoft.sqlserver.jdbc.TDSTokenHandler.onEOF(tdsparser.java:246)
at com.microsoft.sqlserver.jdbc.TDSParser.parse(tdsparser.java:83)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.sendLogon(SQLServerConnection.java:2532)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.logon(SQLServerConnection.java:1929)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.access$000(SQLServerConnection.java:41)
at com.microsoft.sqlserver.jdbc.SQLServerConnection$LogonCommand.doExecute(SQLServerConnection.java:1917)
at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:4026)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1416)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1061)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:833)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:716)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:841)
at java.sql.DriverManager.getConnection(DriverManager.java:664)
at java.sql.DriverManager.getConnection(DriverManager.java:247)
at guii.JdbcSQLServerConnection.main(JdbcSQLServerConnection.java:25)

Answer 1

Trouble Shooting Notes

1. Use integratedSecurity=true again

2. Check if you have the sqljdbc_auch.dll in your system32 folder Check out this link Make sure you use the correct one (32 vs 64 bit) Make sure the sqljdbc_auch.dll is in the Windows system path

3. Check if the properties of your Server instance are set correctly: access rights, make sure it actually listens in the port 1433, ... check out this link and don't just look at the accepted answer but the other two as well.

4. make sure your firewall does not prevent any connections

5. check out if your Java Version matches the jdbc Version you use sqljdbc4.2 needs Java 1.8, jdbc4.1 needs java 1.7. look here